Metal-cutting tool.



H. K. PORTER.

METAL CUTTING TOOL.

APPLICATION FILED mm. mm.

Patented Nov. 23, 1915.

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HENRY K. PORTER, OF BOSTON, .MASSACHUSETTS.

METAL-CUTTING- TOOL.

Application filed January 2, 1915.

To all whom 2'25 may concern:

Be it known that T, HENRY K. PORTER, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented new and useful Improvements in Metal-Cutting Tools, ofwhich the following is a specification.

This invention relates to a tool for cutting metal and is especiallyadapted for cutting rods and bolts.

The object of the invention is to provide a I powerful hand tool for thepurpose specified and one in which the cutting edges of the.

tool may be quickly and accurately adjusted relatively to each other soas to bring said cutting edges accurately together and make up for anymaterial lost by wear, breakage or by grinding said cutting edges.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims.

Referring to the drawings: Figure 1 is a plan view of my improvedcutting tool. Fig. 2 is a plan view of the same partly broken away andshown in section, with the parts adjusted to place them in slightlydifferent positions relatively to each other and to bring the cuttingedges together. Fig. 3 is an enlarged sectional elevation taken on line33 of Fig. 1. Fig. 4; is an enlarged sectional elevation taken on line4. l of Fig. 1. Fig. 5 is a detail section taken on line 55 of Fig. 2.Fig. 6 is a detail sectional view of a modified form.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 5 and 6 are cutter levers which are pivotally connectedto each other by pivotal screws 7 and 8, respectively, said screwsprojecting through a strap plate 9 and having screw-threaded engagementwith another strap plate 10. Said cutter levers are further connectedtogether by teeth 11 on the cutter lever 5 meshing into teeth 12provided on the cutter lever 6. A pair of handles 13 and 1 1 arepivotally connected to the cutter levers 5 and 6 by pivotal screws 15and 16, respectively. A pivot 17 connects the handles 13 and 14:together.

The handle 14: is bifurcated to form two cars 18 and 19 and betweenthese cars an ear 20 on the handle 13 projects. The car 20 is providedwith a slot 21 which, when the tool is new, is filled with malleablematerial Patented Nov. 23, 1915.

Serial No. 35.

22, such as lead. A port 23 leads out of one end of the slot 21.

The pivot 17 is preferably made in the form of a screw which extendsthrough holes 2 1 and 25 in the ears 1S and 19, rcspectively, and hasscrew-threaded engagement with the car 19. Said pivotal screw 17 extendsthrough the slot 21 and engages the malleable material or lead 22therein.

A screw 26 having screw-threaded e11- gagement with the handle 13 formsan adjustable stop constituting an auxiliary fulcrum which is adapted toengage when properly adjusted another stop 27 forming a part of thehandle 14.

A permanent stop 28 on the handle 18 abuts against another stop 29forming a portion of the handle 14 when the parts are in the properrelation to each other so that the cutting edges of the cutters 5 and 6just engage each other.

WVhen the metal is being cut by my improved tool the natural tendency ofthe movement of the cutter levers 5 and 6 upon their respective pivots 7and S is to turn said pivots to the left and right, respectively, and,therefore, the screw-threads on the pivots 7 and 8, where they screwinto the plate 10, are made left and right, respectively. It would,however, be undesirable to keep screwing up said pivotal screws 7 and 8,fo: the reason that it would bind the strap plates 9 and 10 against thecutter levers 5 and 6 and make it dii'licult to move the same to performtheir work, and to overcome this tendency the heads 30 and 31 of thescrews 7 and 8, respectively, are 7 provided with teeth 32 and 33,respectively, upon their under faces, these teeth being cut in oppositedirections so as to oppose any tendency ofthe screws 7 and 8 to bind theplates 9 and 10 against the cutter levers 5 and 6.

The general operation of the device here inbefore described is asfollows: In Fig. 1 the tool is shown with the cutting edges of thecutter levers 5 and 6 meeting and with the stops 28 and 29 abutting,while the stop screw 26 is adjusted so as not to abut against the stop27 on the handle 1%. To open the cutter levers 5 and 6 the handles 13and 141 20. reason of the stop screw 26 abutting agalnst ter levers 5and 6 meet and at this time the pivotal screw 17 would be at the upperend of the slot 21, as illustrated in dotted lines (Fig. 1). After thecutting edges of the cutter levers 5 and 6 have worn away or beensharpened so as to wear them away and it is desired to bring saidcutting edges together, then the adjusting screw 26 is advanced until itmeets the stop 27 on the handle 1% before the permanent stop 28 engagesthe stop 29 forming a part of the handle 14. Then when the handles aremoved toward each other the screw 17 will be forced downwardly in theslot 21 by reason of the stop 26 encountering the stop 27 on the handle14 and a portion of the lead 22 in said slot will be forced into andthrough the port 23. This will change the position of the pivot 17 inthe slot 21, thus causing the pivots 15 and 16 to be forced apart by thestop 27 and forming an auxiliary fulcrum about which the handles 13 andl l rotate until the screw 17 moves downwardly inthe slot 21 and henceas the pivots 15 and I 16 are movedapart the cutter levers 5 and 6 willbe 'HlOVGCl apart on the side of their pivots adjacent to the pivots 15and 16 and will be moved toward each other on the sides of their pivotsupon which are located the cutting edges of said cutter levers. Thescrew 26 is advanced sufficiently so that when the cutting edges of thecutter levers 5 and 6 meet, the stop 28 will encounter the stop 29 onthe handle 1% and the tool is then in condition to be used to the bestadvantage in its changed condition for cutting metal.

It will be noted that on the handle 14 there is a boss 34: which isintegral with said handle and serves as a means, when the tool isjapanned, for suspending said tool during the japanning operation, saidtool being suspended by means of suitable clips which are connected tothe boss 34 on one side of the tool and to the screw 26 on the oppositeside. 1

It is also to be understood that I do not limit myself to a screw in oneof the handles, as 13, and a stop as 27 on the handle 14: for said screw26 to abut against, but that said stop 27 and the boss 34- may bereplaced by a screw 35, as illustrated in detail in Fig. 6 withoutdeparting from the spirit of my invention.

Another object .of the boss 3a is to make the tool appear symmetrical inits design.

Having thus described my invention, what I claim and desire by LettersPatent to secure is:

1 A metal cutting tool having, in combination, a pair of cutter leverspivotally connected to each other, a pair of handles, a pair of pivotsdirectly connecting said cutter levers to said handles, a pivotconnecting said handles together and located between said pair ofpivots, said last-named pivot being fastened to one of said handles andprojecting through a slot in the other of said handles, malleablematerial. interposed between said last-named pivot and one end of saidslot and a stop on one of said handles constructed and arranged to abutagainst the other of said handles, whereby upon forcing said handlestoward each other said malleable material may be compressed and thelocation of said pivot in said slot changed.

2. A metal cutting tool having, in combination, a pair of cutter leverspivotally connected to each other, a pair of handles, a pair of pivotsconnecting said cutter lovers to said handles, a pivot connecting saidhandles together and located between said pair of pivots, saidlast-named pivot being fastened to one of said handles and projectingthrough a slot; in the other of said handles, said slot being filledwith malleable material between said last-named pivot and one end ofsaidslot and having a port leading out of the same through which a portionof said malleable material may be forced.

3. A metal cutting tool having, in combination, a pair of cutter leverspivotally conneeted to each other, a pair of handles, a pair of pivotsconnecting said cutter levers to said handles, a pivot connecting saidhandles together and located between said pair of pivots, saidlast-named pivot being fastened to one of said handles and projectingthrough a slot in the other of said handles, said slot being filled withmalleable material between said last-named pivot and one end of saidslot and having a port leading out of the same through which a portionof said malleable material may be forced and an adjustable stop on oneof said handles constructed and arranged to abut against the other ofsaid handles adjacent to said last-named pivot.

4:. A metal cutting tool having, in C0111- bination, a pair of cutterlevers pivotally connected to each other, a pair of handles, a pair ofpivots connecting said cutter levers to said handles, a pivot connectingsaid handles together and located between said pair of pivots, saidlast-named pivot being fastened to one of said handles and projectingthrough; a slot in the other of said handles, said slot being filledwith malleable material between said last-named pivot and one end ofsaid slot and having a. port leading out of the same through which aportion of said malleable material may be forced, an adjustable stop onone of said handles constructed and arranged to abut against the otherof said handles adjacent to said lastnamed pivot and a permanent stop onone of said handles adapted to abut against the other of said handleswhen the cutting edges of said cutters are in contact with each other.

5. A metal cutting tool having, in combination, a pair of cutter leverspivotally connected to each other, a pair of handles, a pair of pivotsconnecting said cutter levers to said handles, a pivot connecting saidhandles together and located between said pair of pivots, saidlast-named pivot being fastened to one of said handles and projectingthrough a slot in the other of said handles, and an adjustable stop onone of said handles immediately adjacent to said last-named pivotconstructed and arranged t abut against the other of said handles andconstituting an auxiliary fulcrum.

6. A metal cutting tool having, in combination, a pair of cutter leverspivotally connected to each other, a pair of handles, a pair of pivotsconnecting said cutter levers to said handles, a pivot connecting saidhandles together and located between said pair of pivots, saidlast-named pivot being fastened to one of said handles and projectingthrough a slot in the other of said handles, a stop on one of saidhandles immediately adjacent to said last-named pivot constructed andarranged to abut against the other of said handles and a permanent stopon one of said handles adapted to abut against the other of said handleswhen the cutting edges of said cutters are in contact with each other.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HENRY K. PORTER. Witnesses:

CHARLES S. Goomnc, SYDNEY E. TAFT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

' Washington, D. G.

